1/* $OpenBSD: ssh-gss.h,v 1.14 2018/07/10 09:13:30 djm Exp $ */ 2/* $FreeBSD$ */ 3/* 4 * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#ifndef _SSH_GSS_H 28#define _SSH_GSS_H 29 30#ifdef GSSAPI 31 32#if defined(HAVE_GSSAPI_GSSAPI_H) 33#include <gssapi/gssapi.h> 34#elif defined(HAVE_GSSAPI_H) 35#include <gssapi.h> 36#endif 37 38#ifdef KRB5 39# ifndef HEIMDAL 40# ifdef HAVE_GSSAPI_GENERIC_H 41# include <gssapi_generic.h> 42# elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H) 43# include <gssapi/gssapi_generic.h> 44# endif 45 46/* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ 47 48# if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE 49# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name 50# endif /* !HAVE_DECL_GSS_C_NT_... */ 51 52# endif /* !HEIMDAL */ 53#endif /* KRB5 */ 54 55/* draft-ietf-secsh-gsskeyex-06 */ 56#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 57#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 58#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 59#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 60#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 61#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 62 63#define SSH_GSS_OIDTYPE 0x06 64 65typedef struct { 66 char *filename; 67 char *envvar; 68 char *envval; 69 void *data; 70} ssh_gssapi_ccache; 71 72typedef struct { 73 gss_buffer_desc displayname; 74 gss_buffer_desc exportedname; 75 gss_cred_id_t creds; 76 struct ssh_gssapi_mech_struct *mech; 77 ssh_gssapi_ccache store; 78} ssh_gssapi_client; 79 80typedef struct ssh_gssapi_mech_struct { 81 char *enc_name; 82 char *name; 83 gss_OID_desc oid; 84 int (*dochild) (ssh_gssapi_client *); 85 int (*userok) (ssh_gssapi_client *, char *); 86 int (*localname) (ssh_gssapi_client *, char **); 87 void (*storecreds) (ssh_gssapi_client *); 88} ssh_gssapi_mech; 89 90typedef struct { 91 OM_uint32 major; /* both */ 92 OM_uint32 minor; /* both */ 93 gss_ctx_id_t context; /* both */ 94 gss_name_t name; /* both */ 95 gss_OID oid; /* client */ 96 gss_cred_id_t creds; /* server */ 97 gss_name_t client; /* server */ 98 gss_cred_id_t client_creds; /* server */ 99} Gssctxt; 100 101extern ssh_gssapi_mech *supported_mechs[]; 102 103int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 104void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 105void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 106void ssh_gssapi_supported_oids(gss_OID_set *); 107ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 108void ssh_gssapi_prepare_supported_oids(void); 109OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 110 111struct sshbuf; 112int ssh_gssapi_get_buffer_desc(struct sshbuf *, gss_buffer_desc *); 113 114OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 115OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 116 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 117OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 118 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 119OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 120void ssh_gssapi_error(Gssctxt *); 121char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 122void ssh_gssapi_build_ctx(Gssctxt **); 123void ssh_gssapi_delete_ctx(Gssctxt **); 124OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 125void ssh_gssapi_buildmic(struct sshbuf *, const char *, 126 const char *, const char *); 127int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 128 129/* In the server */ 130OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 131int ssh_gssapi_userok(char *name); 132OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 133void ssh_gssapi_do_child(char ***, u_int *); 134void ssh_gssapi_cleanup_creds(void); 135void ssh_gssapi_storecreds(void); 136const char *ssh_gssapi_displayname(void); 137 138#endif /* GSSAPI */ 139 140#endif /* _SSH_GSS_H */ 141